An acoustic system was designed to investigate microbubble concentrations and distributions in the ocean. The system consisted of a one-dimensional standing-wave resonator and a reverberation sensor. Concentrations are determined by measurement of the variation in system Q and the change in reverberation level produced by the resonant bubble response. The resonator and the sensor, while functioning independently, both measure bubble concentration as a function of depth and inferred size and thus provide a unique data comparison. The system has been designed to measure bubbles from approximately 700 microns to 30 microns utilizing frequencies from 5 tp 100 kHz at depths to 100 ft. Initial tests utilizing a bubble generator in an anechoic tank have demonstrated the system's capability to measure bubble concentrations.
Naval Postgraduate School (U.S.)
Engineering Acoustics Electrical Engineering
Naval Postgraduate School
M.S. in Electrical Engineering M.S. in Engineering Acoustics
Department of Electrical Engineering Committee for Engineering Acoustics
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Lieutenant, United States Navy Lieutenant Commander, United States Navy